QTH.COM Swap Chat

best of all worlds. 2 of the same thing. If you have different symptoms on the two radios, start by swapping parts. The symptom should lead you to some section of each radio. work on what seems to be the simplest failure. Once you get one radio working completely , you then have a a parts caddy to u...

Since no replys,. Re post as exactly as possible , the symptoms. this should get you some replys as to the severity of the problem and the likely persons to do the job, or more likely "" they all have that problem,, its easy fix, just..........." or I had that problem and it was ........ always incl...

Gramatically its correct. If it had low out put power and low audio and maybe scratchy volumn control it would be "80%" with 'except ' notch filter not working.. So all the working parts being 'factory spec'ed except notch filter the it would be "100% except......." It all depends on how you hold yo...

I am guessing but '8 pin' says to me standard vacuum tubes.. So bust up a tube with all 8 pins and de-solder the pins.. and perhaps a tube socket for the other end as needed. Bakelite sockets are best. Junk box is your friend..Never throw nuttin' away.. or if you are dispirit RADIODAZE .com lots of ...

forgot.. emery boards.. especially the fine surface type. for cleaning relay contacts, particularly heavy duty contactors with pencil eraser sized contacts. Plain paper works to clean small relay contacts,, use some alcohol to clear sticky stuff.. Isopropyl not denatured..

the zener is likely part of the crow bar circuit.. so just replaceing it wont fix the problem, but would likely just burn up again. I dont have a schematic of the 125 but it must be similar to the 28 volt supply in the HANDBOOK. The zener , I think is to trigger the crow bar circuit causing the DC i...

AM but where? 40 meters?? Same basic antenna rules as any other mode. 468/F (mcycles)

just listening to am broadcast band, then really long wire and maybe a 365mmfd old broadcast variaible cap..accross the antenna input if using a BC band radio..

more 'forgots' ////... eyeyball on a stick. Dental mirror. plastic is better if around wireing..

I forgot tweezers,, both normal open and clamping type. Hemostats of several sizes.

We would need a picture or drawing of what yours looks like to see how it different or what might be a common plug/socket arrangement. perhaps it's been modified in the past to a different set up.

An antenna tuner,, technically a transmitter matching device, just makes the near end of the coax or feeder, appear to the radio output as close to 50 ohms . It does nothing to the antenna. If the antenna is way out of resonance for the frequency desired then its still just an atenuator, no matter w...

Just to stir the mud a bit.. Some ideas on tools you need that you didnt think of.. pipe cleaners,,,,,,Q-tips, ,, small crochet hook to re hook springs, Or ( IBM spring hooks from Seattle Platen),,, shis-ke-bob stick to probe relay contacts while live.. round tooth picks as ckeaning tools,,, dental ...

the purpose is to provide signal to an amplifier and then programm decoder to break down coded type signals. you might not hear anything as the level is way too low for a speaker load of only 4 or 8 ohms.
hook input to an amp or directly to your computer to test.

questions to answer.. what does the display show if put on 146.520.. is it 146.525 ??? is the +5 offset switch/setup turned on?? How do you know it transmits correctly. be sure and look at the display when transmitting. Everything is worth fixing.. Narrow down the fault as accurate as you can. Then ...

If you chart out the lengths you will see some multiples of length. 40 and 15 are related.. as are 10 and 20 or 40 and 80. Simpler antenna would be a fan dipole. one feed point, multiple wires cut to length.. Plus a lot of weight for that many traps.. Think separate antennas. An 40/80 trap dipole,(b...

not familiar with either device. but........ it must be DC and there for 2 wires.. plus and minus.. possibly a third wire which would be frame ground for safety.. figure out the plus side of the panel and plus side of input to controller. wire that and then the other should be minus. if a third wire...

That is the equipment you intend to use. I still dont understand the question or concerns..
That kind of equipment is pretty generic.. Why would Tennessee be any different.?

I dont live there but amateur radio is OK every where.. more or less.
Just what are your concerns.. mountains,, local laws/zoning.. interference,man made or atmospheric??
be Pacific.........................................

I would guess electrical grease from electric supply/hardware store, used on aluminum wire connections,, also in auto work.. My suggestion is just rub some on your fingers to make them slightly slick and wipe along the shaft. thus a very thin coat. At a slow speed, not much lub is needed.

Any mars mod should be available from your Mars co-ordinator.. Also,,if Mars uses vhf uhf...
Any other,, suggests use in un-authorized frequencys and is probably why you have had no replys , as most hams will not assist in messing up a prefectly good radio.

forgot.. state your location so any local maybe able to help out and also advise on ham fests in the area

a local ham fest is a good bet.. also if remote to anywhere, QRZ.COM sale forum. also here on QTH... Eham.net. lastly Craigs list.. be careful of the "" I'll give you a hunnert bucks to take it off your hands::"" people.. Look thru the QRZ sales stuff to try and get a ballpark price on the stuff. re...

I didnt check , but if its really a WRL amp then its 30 plus years old. Could be a lot more than weak tubes in it..

no one else answered...6/25
Don

first off, compare the mic wireing of the 7000 with the 7200 to be sure they are either the same ,
or if different, which wires.
the if necessary, open up the heil mic and wring out the wireing with your ohm meter.
Basic door bell electricity..

you can not just swap mics with out verifying the pin out of the connectors. Especially since electret mics have an 8 volt or so line to power the element. Connecting the wrong pin to the 8 volts would either wipe out the 8 volt supply or put 8 volts somewhere you really dont want it.. Get help with...